Board Members

David Newman-TokerDavid E. Newman-Toker, MD, PhD


David Newman-Toker, MD, PhD, is a Professor of Neurology, Ophthalmology, & Otolaryngology at the Johns Hopkins University School of Medicine. He also holds joint appointments in Emergency Medicine and Health Sciences Informatics at the School of Medicine, as well as in Epidemiology and Health Policy & Management at the Johns Hopkins Bloomberg School of Public Health. Dr. Newman-Toker also serves as the President of the Society to Improve Diagnosis in Medicine.

Dr. Newman-Toker's academic mission is to eliminate harms from diagnostic errors and maximize the accuracy and efficiency of diagnostic testing in clinical practice. He is as a Core Faculty member of the Armstrong Institute for Patient Safety & Quality, where he serves as Director of the Johns Hopkins Armstrong Institute Center for Diagnostic Excellence, focused on enhancing diagnostic safety, quality, and value. Dr. Newman-Toker's research focuses on preventing missed strokes in the emergency department and primary care, especially among patients presenting with acute, severe vertigo or dizziness. Dr. Newman-Toker's clinical expertise is in disorders of the brainstem and cranial nerves, including visual loss, double vision, and vertigo. He serves as Director of the Division of Neuro-Visual & Vestibular Disorders. His clinical practice focuses on emergency evaluation of patients with acute vertigo and dizziness. He does not currently have an outpatient clinic practice.

Dr. Newman-Toker completed his undergraduate education at Yale University (BS, 1991) and his medical training at the University of Pennsylvania School of Medicine (MD, 1995). After completing his Neurology residency at the Massachusetts General Hospital (1999), he went on to complete fellowships in Neuro-Ophthalmology at Harvard University/Massachusetts Eye & Ear Infirmary (2000) and in Neuro-Otology at the Johns Hopkins University School of Medicine (2002). He completed his doctoral training in clinical research methods at the Johns Hopkins Bloomberg School of Public Health through the Graduate Training Program in Clinical Investigation (PhD, 2007).

Robert TrowbridgeRobert Trowbridge, MD


Robert Trowbridge, MD is an Associate Professor of Medicine at Tufts University School of Medicine and Director of Undergraduate Medical Curriculum at Maine Medical Center in Portland, Maine. He is a clinician-educator with expertise in teaching clinical reasoning and avoidance of diagnostic error. He has won over 20 clinical teaching awards and remains clinically active as a hospitalist. His research has centered on ways of helping to identify diagnostic errors and provide feedback to clinicians in a manner that improves diagnostic reliability with over 30 peer-reviewed publications and 20 book chapters. He served as the Co-Chair of the SIDM Education Committee from 2013-2016 and was a longtime member of the Planning Committee for the International Diagnostic Error in Medicine conference, chairing the conference in 2016 and 2017.

Timothy MosherTimothy J. Mosher, MD


Dr. Mosher is the Kenneth L. Miller Chair of Radiology and Distinguished Professor of Radiology and Orthopedic Surgery at the Penn State University College of Medicine. Dr. Mosher has published over 60 manuscripts with the majority in the area of musculoskeletal imaging, quantitative cartilage imaging, and MRI technical development. Dr. Mosher is a Fellow of the International Society for Magnetic Resonance in Medicine. He served as Deputy Editor for Magnetic Resonance in Medicine, Osteoarthritis and Cartilage, and is currently an Associate Editor for a peer-reviewed journal, Radiology. He is a frequent NIH study section reviewer and has served on the Scientific Advisory Board for the Canadian Arthritis Network.

Edward HofferEdward Hoffer, MD


Edward Hoffer is Associate Professor of Medicine, part-time, at Harvard Medical School and Senior Scientist at the Massachusetts General Hospital (MGH), where he is Assistant Director of the Laboratory of Computer Science. Ed has been the lead content developer of DXplain, the MGH-developed expert system for diagnostic decision support, responsible for database development and maintenance. He is currently leading efforts to expand the role of diagnostic decision support by integrating it into electronic medical record systems. He has taught both physicians and the lay public through formal Grand Rounds and public lectures, focusing on his clinical areas of interest in atrial fibrillation and geriatric cardiology as well as on health system issues. He has also contributed via committee work and leadership roles at the hospital, state and national levels. Dr. Hoffer received his medical degree from Harvard Medical School and completed his residency and fellowship training in medicine and cardiology at MGH. He is a Fellow of the American College of Medicine, the American College of Cardiology and the American College of Medical Informatics. He has published over 50 scientific papers in the field of medical informatics. He has edited a textbook on emergency medical problems in the elderly and has most recently published a book titled Prescription for Bankruptcy, detailing the failings of the US health care system and proposing remedies.

Helen BurstinHelen Burstin, MD, MPH


Helen Burstin, MD, MPH is the Executive Vice President and Chief Executive Officer of the Council of Medical Specialty Societies (CMSS). CMSS and its 43-member societies represent almost 800,000 U.S. physician members. CMSS member societies collaborate to enhance the quality of care delivered in the U.S. healthcare system and to improve the health of the public. Dr. Burstin formerly served as Chief Scientific Officer of The National Quality Forum. Prior to joining NQF, Dr. Burstin was the Director of the Center for Primary Care, Prevention, and Clinical Partnerships at the Agency for Healthcare Research and Quality (AHRQ). Prior to joining AHRQ, Dr. Burstin was Director of Quality Measurement at Brigham and Women’s Hospital and Assistant Professor at Harvard Medical School. She was selected as a Baldrige Executive Fellow in 2016. Dr. Burstin is the author of more than 90 articles and book chapters on quality, safety and disparities.

Jen CampisanoJen Campisano, JD


Jen is a six-year breast cancer survivor, though she still struggles with that term. At 32, she was mistakenly diagnosed with metastatic breast cancer. She was treated for metastatic breast cancer for four-and-a-half years before her doctors concluded that she was in remission and had been exhibiting an autoimmune disease rather than metastases. She will always be a staunch ally to patients living with metastatic disease.

A lawyer and former lobbyist before the federal government, Jen writes about motherhood, policy, and cancer on her blog and lends her legislative experience to advocacy groups such as YSC and METUP. She is also a member of the National Coalition for Cancer Survivorship’s Cancer Policy & Advocacy Team.

She has written for The Huffington Post,,, Nancy’s Point, Women You Should Know, Cancer Knowledge Network, Healing Journeys, and Rage Against the Minivan. Jen was featured on The Today Show in October 2014 in a segment kicking off Breast Cancer Awareness Month hosted by Joan Lunden. Jen has also been featured in articles on the Livestrong Blog,, as part of Health Monitor’s Guide to Metastatic Cancer, in the Idaho Statesman, on a podcast on the Cancer GamePlan, and in a radio segment on The Stephanie Miller Show.

Beth Daley UllemBeth Daley Ullem, MBA


Beth Daley Ullem, MBA is a nationally recognized governance expert and advocate for safety and quality in health care. Beth works with health system leadership teams, boards, and healthcare industry leaders to develop programs that improve the quality of patient care and better enable boards to provide oversight of quality and safety. Beth was the project lead and lead author for the Institute for Healthcare Improvement (IHI) White Paper: Framework for Effective Governance of Health System Quality. She was also an expert contributor to Leading a Culture of Safety: A Blueprint for Success.

Gurpreet DhaliwalGurpreet Dhaliwal, MD


Gurpreet Dhaliwal, MD is a Professor of Medicine at the University of California San Francisco. He studies how doctors think, how they diagnose, how they make treatment decisions and how they develop expertise. Considered one of the most skillful diagnosticians and clinician-educators in the U.S. today, Dr. Dhaliwal sees patients and teaches medical students and residents at the San Francisco VA Medical Center. Dr. Dhaliwal is a member of the UCSF Academy of Medical Educators and the UCSF Department of Medicine Council of Master Clinicians. He has received multiple teaching awards at UCSF and the 2015 national Alpha Omega Alpha Robert J. Glaser Distinguished Teacher Award. He writes for The Wall Street Journal’s “The Experts” healthcare blog. He has published over 100 articles in leading medical journals including the New England Journal of Medicine and the Journal of the American Medical Association.

Tom LeeTom S. Lee, PhD, MBA


Tom Lee is CEO and Founder of SA Ignite, a cloud-based technology company whose mission is to help healthcare providers successfully navigate the transition to value-based care. He is a serial entrepreneur and leading expert in healthcare value-based programs such as Merit-based Incentive Payment System (MIPS) and Alternative Payment Models (APMs). The company's platform serves 14,000+ clinicians and was awarded the 2017 Frost & Sullivan Enabling Technology Leadership Award. His interest in diagnostic error stems from personal and family experiences and a belief that reducing such errors are vital to improving patient outcomes and the financial sustainability of healthcare. Tom is a member of the Young Presidents’ Organization and earned a PhD in Physics from the University of California, Berkeley, where he was a National Science Foundation Fellow, and an MBA with Distinction from the Kellogg School of Management at Northwestern University.

David MeyersDavid L. Meyers, MD, FACEP

Director; Board Relations Committee; Listserv Moderator

Dr. Meyers is an emergency physician and former Chair of Emergency Medicine at Sinai Hospital in Baltimore. He also served as Chief of the Medical Practice Division at EmCare, Inc., a large national physician practice management company where he was responsible for the risk and claims management and professional liability insurance programs for more than 7,500 clinicians and six million annual emergency department visits. He led the development and implementation of a number of successful initiatives to reduce diagnostic errors in high risk, high frequency conditions. He is active in the American College of Emergency Physicians (ACEP) where he chaired the first Patient Safety Task Force and the Quality Improvement and Patient Safety (QIPS) Section. Besides his on-going interest in reducing diagnostic errors, Dr Meyers is currently pursuing a Masters Degree in Bioethics at the Berman Institute of Bioethics at the Johns Hopkins University.

Dana SiegalDana Siegal, RN, CPHRM, CPPS


Dana Siegal is the Director of Patient Safety for CRICO Strategies, a division of the Harvard Medical Institutions. She provides analytical and educational services on patient safety to academic medical centers, community hospitals, and physician practices with an emphasis on diagnostic-related claims, OB, EHR and Emergency Medicine. She provides leadership to the Comparative Benchmark System (CBS), a database of more than 350,000 MPL claims from a national landscape of academic and community organizations. Prior to her current role, Ms. Siegal had 15 years of clinical nursing leadership roles in Emergency Medicine, and 20 in healthcare quality and hospital risk management. She has extensive experience in the analysis of provider performance data, adverse and sentinel event management, apology and disclosure, physician peer review, and litigation preparation and support. She currently serves on the planning committees for Hospital Insurance Forum (HIF), American Society for Healthcare Risk Managers (ASHRM), and on the Editorial Board for the ASHRM journal.

Paul EpnerPaul L. Epner, MBA, MEd (Ex-officio)

Chief Executive Officer

Paul L. Epner, MBA, is the Chief Executive Officer and co-founder of the Society to Improve Diagnosis in Medicine (SIDM). He is also the Chair of the Coalition to Improve Diagnosis, a multi-organization collaboration. Paul is a Past President of the Clinical Laboratory Management Association (CLMA) where he also created the Increasing Clinical Effectiveness (ICE) initiative. He is a member of the CDC’s “Clinical Laboratory Integration into Healthcare Collaborative,” a consultant to their Laboratory Medicine Best Practices program (an evidence-based practice initiative), and Chair of the Coordinating Council on the Clinical Laboratory Workforce’s (CCCLW) Taskforce on Measuring Testing-Related Value.

Disclosure Policy

Read the Society to Improve Diagnosis in Medicine (SIDM)'s Disclosure & Conflict Policy.